Ada Bus™ Wiring - Networks - Ada Delta-88 Manual

ADA Bus™ Wiring - Networks
The ADA Bus™, is the proprietary serial data network which provides two-way communica-
tion between all ADA Bus™ components. This network permits real-time, two-way data to all
keypads and even permits control and feedback with touch-screen controllers. ADA imple-
ments extensive addressing in most of the ADA Bus™ components that allow them to operate
on different systems or in various configurations within the same system. The ADA Bus™ runs
on four wires and all components connect cleanly to the WH-3000 Wiring Harnesses. The four
wires are for:
Pin 1 Ground, Pin 2 Transmit Data, Pin 3 Receive Data, Pin 4 Voltage (+15VDC)
The WH-3000 has a total of 10 removable four pin screw terminal connectors and provide the
ideal wiring platform for the ADA Bus™. The first two connectors on the WH-3000, labelled
"J1" and "J2", are used for a direct feed from the primary Delta-88 (on J1) and as a loop-through
(J2) to additional WH-3000s. The remaining 8 screw terminal connectors are for all other ADA
Bus™ components including all keypads. These connectors are provided with a thermal
protection relay. Should a short between ground and +V exist on the line, the relay will open,
protecting the power supply of the ADA Bus™ drivers (typically Delta-88). While several
cable manufacturers provide "ADA Bus™" Wire, The wiring specified for the ADA Bus™ is:
3 Conductor/18 Gauge with an Overall Stranded Shield with at least a 90% Braid
ADA strongly suggests running all ADA Bus™ Cables from the keypad locations directly
home to the system mainframe. While in some cases, daisy-chaining keypads will be the only
option, ADA keypads draw a significant amount of power, needed to drive the LED displays.
Thus no more than two or three keypads should ever run on any one single ADA Bus™ line.
Furthermore, if each keypad has its own independent home run, should any damage occur to
the home run's wiring, only the keypad location with the damaged line will be affected.
Many other components, typically SSD-66 surround decoders, are commonly located in
portions of the home other than the system mainframe. It is important that the SSD-66's
location also receive an independent ADA Bus™ cable run since it too operates on the ADA
Bus™.
If you are locating the MT-3000, PCT-8, and ACC-3000, along with the system's central sources,
in a location in the home other than that of the central mainframe, you will also need to run an
ADA Bus™ cable to this remote location. While this scenario suggests running a separate cable
for each remote ADA Bus™ component, a single cable run will do since the ACC-3000 or PCT-
8 can provide power to the ADA Bus™ on a local level.
Please note, that while all ADA Bus™ components have an identical removable four-pin screw
terminal ADA Bus™ connector, the only component with a different connector is the MT-3000.
The ADA Bus™ connector on the MT-3000 is a stereo 1/4" phone jack with the fourth wire (+V)
connected to pin 4 or any of the tuner's three "Antenna Preamp" jacks. Since the MT-3000 wires
to a BI-3000 Bus Isolator (as does the SSD-66 for acoustical protection from control interfer-
ence), the special MT-3000 ADA Bus™ wire which goes to the BI-3000 is usually included with
the MT-3000. See the Appendix on the MT-3000 for more information.
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